Isostearoyl Hydrolyzed Silk

INCI: ISOSTEAROYL HYDROLYZED SILK

CAS Number
Not specifically assigned (condensation product of isostearic acid chloride and hydrolyzed silk)
Function
Skin conditioning
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” CIR concluded hydrolyzed silk safe; read-across applies to acylated derivative

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Animal origin (silk) with no BSE risk; safety supported by read-across from hydrolyzed silk, but relevant for vegan and cruelty-free labeling claims.

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Concern Level: Low

Frequently Asked Questions

Is Isostearoyl Hydrolyzed Silk safe in cosmetics?

Animal origin (silk) with no BSE risk; safety supported by read-across from hydrolyzed silk, but relevant for vegan and cruelty-free labeling claims. The EU classifies Isostearoyl Hydrolyzed Silk as "permitted". Safety rating: GOOD.

Is Isostearoyl Hydrolyzed Silk allowed in the EU?

Isostearoyl Hydrolyzed Silk EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Isostearoyl Hydrolyzed Silk do in cosmetics?

Isostearoyl Hydrolyzed Silk functions as: Skin conditioning. It is classified as a cosmetic ingredient in our database. CAS number: Not specifically assigned (condensation product of isostearic acid chloride and hydrolyzed silk).

What is the Margin of Safety for Isostearoyl Hydrolyzed Silk?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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